[en] During the operation of thermonuclear devices and reactors, the surfaces of such major components as container walls, beam limiters, diverter walls, and beam-dump walls of the injector region will be exposed both to the primary plasma radiations and to secondary radiations from (n,γ), (n,p), (n,α), and other nuclear reactions and from various secondary particle- and photon-emission phenomena induced by the primary radiation. Such energetic radiations striking the surfaces of components of fusion devices and reactors can cause a variety of surface phenomena and thereby (a) the release of major quantities of gas which will contaminate the plasma, and (b) the damage and erosion of the bombarded wall. A summary of recent experimental results on plasma contamination and wall erosion due to radiation blistering and the release of particulate matter from solids under irradiations induced by 14-MeV neutrons will be presented. (author)